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directional array

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  • Directional array — In broadcast engineering, directional array refers to an antenna array arranged such that the superposition of the electromagnetic waves produce a predictable electromagnetic field. By spacing 2 or more antenna elements apart, changing the length …   Wikipedia

  • Directional sound — See sound from ultrasound for a beam of ultrasound that makes audible sound in a restricted target area without a receiving set. Directional Sound refers to the notion of using various devices to create fields of sound which spread less than most …   Wikipedia

  • Directional Sound — See sound from ultrasound for a beam of ultrasound that makes audible sound in a restricted target area without a receiving set. Directional Sound refers to the notion of using various devices to create fields of sound which spread less than most …   Wikipedia

  • Directional antenna — Log periodic dipole array A directional antenna or beam antenna is an antenna which radiates greater power in one or more directions allowing for increased performance on transmit and receive and reduced interference from unwanted sources.… …   Wikipedia

  • Directional Recoil Identification From Tracks — The DRIFT IIb Detector removed from the vacuum vessel for maintenance. The Directional Recoil Identification From Tracks (DRIFT) detector is a low pressure negative ion time projection chamber (NITPC) designed to detect weakly interacting massive …   Wikipedia

  • directional antenna — An antenna or aerial that radiates and receives signals mainly from one direction. For terrestrial radio communications, directionality in an azimuth or a horizontal plane is important. Directional antennae are either monodirectional,… …   Aviation dictionary

  • directional antenna — noun an antenna that transmits or receives signals only in a narrow angle • Hypernyms: ↑antenna, ↑aerial, ↑transmitting aerial • Hyponyms: ↑array, ↑dish, ↑dish aerial, ↑dish antenna, ↑ …   Useful english dictionary

  • Tower array — A tower array is an arrangement of multiple radio towers which are mast radiators in a phased array. Tower arrays can consist of free standing or guyed towers or a mix of them. Tower arrays are used to constitute a directional antenna of a… …   Wikipedia

  • Line array — The term line array means a speaker system that is made up of a varying number of vertically arranged units which give the effect of a single sound source with the same dimensions as the total of the unit of which is made up, the performance of… …   Wikipedia

  • Power dividers and directional couplers — A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port …   Wikipedia

  • Parametric array — The parametric array is a nonlinear transduction mechanism that generates narrow, nearly sidelobe free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the diffraction limit (a …   Wikipedia

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